High-efficiency echelle gratings for MIGHTI, the spatial heterodyne interferometers for the ICON mission

Development of a new generation of low-groove density-blazed echelle gratings optimized for MIGHTI, a space-borne spatial heterodyne interferometer operating in the visible and near infrared is described. Special demands are placed on the wavefront accuracy, groove profile, and efficiency of these g...

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Published inApplied optics. Optical technology and biomedical optics Vol. 56; no. 8; p. 2090
Main Authors Englert, Christoph R, Brown, Charles M, Bach, Bernhard, Bach, Erich, Bach, Kirk, Harlander, John M, Seely, John F, Marr, Kenneth D, Miller, Ian
Format Journal Article
LanguageEnglish
Published United States 10.03.2017
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Summary:Development of a new generation of low-groove density-blazed echelle gratings optimized for MIGHTI, a space-borne spatial heterodyne interferometer operating in the visible and near infrared is described. Special demands are placed on the wavefront accuracy, groove profile, and efficiency of these gratings. These demands required a new ruling for this application, with significant improvements over existing gratings. Properties of a new generation of highly efficient, plane gratings with 64  grooves/mm blazed at 8.2° are reported.
ISSN:2155-3165
DOI:10.1364/ao.56.002090